Prussian Blue
Deep authority and reliable professional stability
Prussian Blue is a saturated, deep shade that commands authority and stability. It functions best as a dominant base or a grounding neutral in corporate and professional designs. Because it is quite dark, pair it with white text for maximum readability, as this combination offers strong contrast. The hex code for Prussian Blue is #003366, a tone that brings a sense of traditional weight to any interface.
About Prussian Blue
Deep water a mile past the harbor lights
What does prussian blue mean?
Darker blues like this one often suggest authority, stability, and quiet formality, so banks, uniforms, and official documents commonly lean on it. Its low lightness and muted saturation give it a closed, heavy feeling, like a room where the blinds stay drawn past noon.
Where you see prussian blue
- navy blazers
- ink on bank checks
- denim jeans
- night sky before full dark
- police uniforms
- blueprint paper
What it works for
It works as a grounded base color for finance sites, formal branding, and layouts that need weight without shouting.
What colors go with prussian blue?
Burnt Sienna #a93400The warm rust orange sits opposite on the wheel and lifts the blue's flat darkness.Mustard #ffdb58A muted yellow keeps the pairing dim and steady instead of loud.Cream #fffdd0Soft near-white lightens the heavy blue without adding a competing color.Coral #ff7f50The pinkish orange adds warmth and keeps the dark blue from feeling cold and empty.Brass #b5a642The metallic yellow-brown gives the dark blue a trimmed, official edge.
Questions about Prussian Blue
What is the hex code for Prussian Blue?
Prussian Blue is #003366. In RGB that is rgb(0, 51, 102), in HSL hsl(210, 100%, 20%) and in CMYK 100%, 50%, 0%, 60%.
How does Prussian Blue compare to navy?
Prussian Blue is significantly darker and more saturated than standard navy, containing cooler, slightly greenish undertones. It projects more gravity and formality than lighter navy shades, making it an excellent choice for backgrounds where you need high contrast without using black.
Is Prussian Blue readable on white or black?
Prussian Blue has a 12.60:1 contrast ratio on white and 1.66:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works for body text and on black it is too faint for text. Try other pairs in the contrast checker.